Category: Rivers of Troyes Champagne Métropole

Definition:
Linear hydrographic entity named or identified by a hydrographic code, decomposing into a Hydrographic Section.
Selection: - All permanent watercourses, natural or artificial, are included:

• Temporary natural streams are included, with the exception of sections of less than 200 m at the upstream ends of the system.
• Temporary artificial or artificialised watercourses are selected on the basis of their importance and the environment (sections along a communication route are excluded, as well as ditches).
• Talwegs that are not marked by the regular presence of water are excluded.
• Underground or busted sections more than 25 m long are retained.
• All watercourses over 5.5 m wide are included. They are represented by a hydrographic section with attribute Fictif="True" superimposed on an object of class Hydrographic Surface.

In their downstream part, the rivers are represented at least up to the leash of the highest seas.
Ditches: large ditches more than 2 m wide are included when they sink permanently. Ditches with non-permanent flow are selected according to the environment. They are usually excluded when they walk along a communication route.

For the list of variables, see pages 124 and 125 of the document "BD TOPO version 3.0 content description": [https://geoservices.ign.fr/sites/default/files/2021-07/DC_BDTOPO_3-0.pdf]

INFORMATION: THE DATA GAME IS AVAILABLE IN THREE FORMATS (.XLSX, .CSV AND *.GPKG). THE NUMBER OF REGISTRATION IS IN THE ORDER OF: 240